code: def test_check():
      """[Model Selection] Test check of valid estimator."""
      np.testing.assert_raises(ValueError, Evaluator, mape)
  
file_path: mlens/mlens/model_selection/tests/test_model_selection.py
imports: import os
  import numpy
  from mlens.model_selection import Evaluator, benchmark
  from mlens.metrics import mape, make_scorer
  from mlens.utils.exceptions import FitFailedWarning
  from mlens.utils.dummy import OLS, Scale
  from mlens.testing import Data
  from scipy.stats import randint
label_desc: Use image node_id 2 for calling a global function with example usage: test_check() without return types